Am I losing weight too slowly?
You're doing great! It all depends on *your* basal metabolic rate, your exercise and food choices, too ... but that metabolic rate is a key factor. You are losing fine and it's nobody else's business what rate you are losing.
This is your journey, not theirs. Each person's body burns calories at it's own rate and it can be influenced a bit with exercise and muscle building, but you're still going to be an individual working with your own metabolic rate.
As long as you're burning more calories than you take in, weight loss is inevitible and you're doing fine. ; ) We're all working on getting healthy and it's not a race (thank goodness)!